Home / 71,704.18-98,947.70-39,872.40

Finding the Fourth Proportional to 71,704.18, 98,947.70 and 39,872.40

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Solution

The fourth proportional to 71,704.18, 98,947.70 and 39,872.40 is: 55,021.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,704.18 : 98,947.70 = 39,872.40 : x
  2. Step 2: Convert to fraction form
    71,704.18/98,947.70 = 39,872.40/x
  3. Step 3: Cross multiply
    71,704.18x = 98,947.70 × 39,872.40
  4. Step 4: Simplify right side
    71,704.18x = 3,945,282,273.48
  5. Step 5: Solve for x
    x = 3,945,282,273.48/71,704.18
  6. Step 6: Final answer
    x = 55,021.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.